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开平涧河地区位于河北省唐山市境内 ,是一个由古生界、中生界及新生界叠合而成的构造盆地。盆内古生界含煤 2 0余层 ,可采及局部可采 9层 ,由东南向西北累积厚度逐渐增大。全区煤层有机碳含量均较高 ,显微组分以镜质组为主 ,演化程度适中 ,多为气煤和肥煤 ,具有较强的生气能力。开平向斜由东南向西北 ,埋深逐渐增加 ,煤层含气量增大 ,变质程度加深 ,吸附量也随之变大 ,显示该盆地西北地区具有较好的勘探前景。盆内煤层气具有较好的上覆盖层 ,埋深 80 0m以下为该盆地寻找天然气的有利部位
Located in the territory of Tangshan City, Hebei Province, Kaiping Jianhe District is a tectonic basin composed of the Paleozoic, Mesozoic and Cenozoic superpositions. Basin Paleozoic coal-bearing 20 layers can be taken locally recoverable 9 layers, from Southeast to Northwest cumulative thickness gradually increased. The organic carbon content of the coal seams in the whole area is relatively high. The microscopic components are mainly vitrinite, and the evolution degree is moderate, mostly gas coal and fat coal, which have strong ability to generate gas. Kaiping syncline from southeast to northwest, the burial depth increases gradually, the coalbed gas content increases, the degree of metamorphism deepens, the adsorption volume also becomes larger, indicating that the basin northwest has a good exploration prospect. The CBM in the basin has a good overburden with a buried site of 800 m below which is a favorable site for finding natural gas in the basin